Solution

On the left path, after the first boss, ignore the fence. Use Airy Wisps to break the fence next to the door to the final boss room.

Description

The pari rose to her feet, and in an instant all was wreathed in flames.

Our last foe was almost comically slothful, but perhaps I would be too if I had flying carpets at my beck and call. Still, she put up a fierce fight, and I shudder to think what might have happened if she took us more seriously. Given how effortlessly she called a rain of fire upon us, I would rather not imagine her in a foul mood.

A legend widely circulated throughout the Near East tells of an ancient Corvosi king who succeeded in bringing a pari under his thrall. He had her craft magicked carpets for his own use, yet knowing the power at the pari's disposal, I struggle to imagine how the king would command her. During my research, I came across other folktales which illustrate elaborate rituals performed when making a pact with fantastic beings. One well-known example consists of three steps: first, one must convey peaceful intent through body language. Second, one must speak a specific set of words. Lastly, one must entertain the being as a final gesture of trust.

Somehow, I wager that the pari we encountered would fall asleep long before such an intricate rite was complete.